this post was submitted on 11 Sep 2023
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But... You can see a divot in the center of the wheel where the string is making contact. It looks like it breaks apart because of that new weak point. It's not like I'm being an armchair physics professor, I'm making an inference.
What string? It's a water jet.
You know, I wasn't sure whether it was a water jet or not, since that's used to cut through STONE. So, it's likely that the wheel was being cut in half prior to it tearing apart.
The ones used to cut through stone and steel typically have diamond "sand" muddying the water. At least the one at my local machine shop does. I'm guessing the one in the gif is straight water.